Calking gun assembly



W. J. S. EKINS CALKING GUN ASSEMBLY Jan. 27, 1953 2 SHEETSSHEET 1 Filed Nov. 10, 1950 v INVENTOR.

Jan. 27, 1953 w. J. 5. EKINS CALKING GUN ASSEMBLY 2 SHEETS-SHEET 2 Filed Nov. 10, 1950 Patented Jan. 27, 1953 UNITED STATES PATENT OFFICE CALKING GUN ASSEMBLY William J. S. Ekins, Cleveland, Ohio Application November 10, 1950, Serial No. 195,038

4 Claims. (01. 222-470) My present invention is directed to a calking gun and more particularly to certain structural features of a rotatable breech assembly and a detachable head assembly therefor.

Briefly, my invention contemplates a calking gun having a breech assembly whereby the barrel portion of the gun, which may be attached either permanently to the gun as an integral part thereof or may comprise a removable cartridge of calking compound, is adapted to be rotated by the user to facilitate a more ready and convenient application of the calking compound. Additionally, where a non-detachable gun barrel is employed, I have devised a new and useful, quickly detachable head assembly to accelerate and simplify the operation of loading the gun barrel with calking compound either in bulk or in cartridge form.

It is one of the primary objects of my invention to demonstrate a breech assembly for use with a calking gun whereby the barrel portion thereof may be rotated readily about its longitudinal axis to assist the user in distributing calking material as it is extruded from the barrel through a distributing nozzle.

It is a further object of my invention to display a new and improved rotatable breech assembly useful for calking guns or the like which is economical to manufacture, simple to assemble and use, and is dependable and sturdy in operation.

It is a still further object of my invention to provide a quickly detachable head assembly especially useful in calking guns having non-detachable barrels whereby the operation of loading the barrel with calking material is greatly simplified.

These and further objects and features of my invention will be recognized by one familiar with the art from the following description and specifications and with reference to the accompanying drawings.

In the drawings:

Figure 1 is a front elevational view, with parts thereof broken away in section, showing a calking gun having a non-detachable barrel and displaying my quickly detachable head and rotatable breech assemblies therewith;

Figure 2 is a partial front elevational View with parts thereof in cross section, displaying the various essentials of my breech assembly as used with a calking gun having a non-detachable barrel, such as that shown in Figure 1;

Figure 3 is another partial cross section, front elevational View similar to Figure 2, but displaying my breech assembly adapted for mounting a throw-away barrel by means of a continuous threaded connection;

Figure 4 is still another partial side elevational view similar to Figures 2 and 3, showing my breech assembly adapted for mounting a detachable throw-away barrel by means of an interrupted thread connection;

Figure 5 is a still further partial side elevational view similar to Figure 3, showing an alternate interrupted thread means for mounting a throw-away gun barrel with my breech assembly;

Figure 6 is a partial front elevational View of the forward or head end barrel portion of a call:- ing gun of the type displayed in Figure 1, showing the removable muzzle cap of my head assembly removed from the muzzle end of the gun;

Figure '7 is a cross sectional side elevational view taken substantially along line ll of Figure 1 and displaying the interlockin relation of my removable muzzle cap with the muzzle end of the calking gun barrel of Figure 1; and

Figure 8 is an enlarged partial sectional view taken along line 8-8 of Figure 7, looking in the direction of the arrows and showing the interlocking arrangement of the fastening means utilized in the head assembly for holding the removable muzzle cap to the gun barrel.

With reference to Figure 1 of the drawings, it will be observed that a calking gun lEl illustrated therein comprises a handle member i l, a trigger l2, a rotatable breech assembly l3, a ram rod assembly l4, and a detachable head assembly l5, the latter being located at the muzzle end of a gun barrel IS. The detailed features and mode of operation of the gun itself, the handle I I, trigger I2 and ram rod assembly [4 are specifically set forth in my co-pending application Serial No. 171,100 filed on June 29, 1950, and so will not be described in further detail herein.

Briefly, however, it may be stated that the gun handle comprises a generally channel shaped structure having two separated side walls 26, 2f! commonly interconnected at the rearward edge by rear end wall 2| through which the ram rod I4 is inserted for sliding movement to move a ram plate assembly 22 along the gun barrel It; in response to progressive racking actuation supplied by the depression of trigger l2 and the subsequent feeding operation of a suitable rack and ratchet mechanism, not shown, but described in detail in my co-pending application of reference herein. The upper ends of handle side walls 28 are distinguished by outwardly turned oppositely reaching flanges 23 adapted to mount my breech assembly l3 thereto.

With specific reference to Figures 1 and 2 of the drawings, it will be recognized that my breech assembly [3, therein illustrated, is especially adapted for mounting a non-detachable type of barrel I0. Specifically, my breech assembly of Figures 1 and 2 utilizes a circular metal breech plate 24 which is substanitally planar except for an inwardly oifset peripheral flange 25 distinguishing its circumferential edge, and an oppositely directed and projecting pivot ear 26 for pivotally supporting a locking bar 2'! associated with the rachet mechanism within handle II as amplified in my application, Serial No. 171,100, of reference. The central portion of breech plate 24 is characterized by a circular opening 28 for the reception therein of a brass bushing 29 used for guiding ram rod I4 through the breech of the gun. Four or more rivets 30 are inserted through suitable openings in breech plate 24 to be received in similar openings in handle mounting flanges 23; two rivets through each flange, for rigidly tying plate 24 to the handle. The rivets are, of course, upset in a conventional manner after insertion through the breech plate and mounting flanges.

It will be recognized that by this simple rigid combination of the breech plate and handle a channeled groove 3| is provided between the breech plate flange 25 and flanges 23 for the sliding reception of an inwardly turned lip 32 which forms a breech cup portion formed integrally with and comprising an extreme rearward or breech end of gun barrel I6. Of course, it will be understood that in assembling the barrel I6, breech plate 24 and handle II, the breech plate is inserted inside of barrel I6 so as to lie inwardly of lip 32 before rivets 30 are secured in place to connect plate 24 and flanges 23. Rotational movement of barrel I6 is easily obtained by rotatably twisting it about its longitudinal axis in a desired direction so that lip 32 thereof will ride along groove 3| of the breech assembly. In this manner a compound distributing nozzle 34 mounted at the outer end of barrel I6 as described in my application, Serial No. 171,100, of reference herein and shown in Figure 1, may be positioned as desired to aid in the distribution of the extruded calking material issuing from the gun nozzle; this is especially desirable for calking around diflicultcorners or the like.

In Figure 3 I have represented an alternate means for accomplishing the desirable features of my breech assembly, especially adapted for use with a throw-away metal compound cartridge and gun barrel such as is disclosed in my copending application of reference. Again breech plate 24a is riveted to flanges 23 of handle I I to form a circumferential groove 3| between the peripheral edge 25a and the flanges 23 in an identical manner with that described above. It will be observed, however, that in this breech assembly there is no direct connection between the breech cup end of barrel Ilia and the channeled opening or groove 3|. Instead, I have utilized a cylindrical breech cup 35 which is formed as a separate member from the barrel Ilia; the latter being of the throw-away type and detachably connected to. an annular internally threaded portion 36 of cup 35 by means of continuous mating thread means 31 formed at the breech end of barrel Ilia. The inner end of breech cup 35, however, is distinguished by an inwardly turned annular lip 38 similar to the previously described lip 32 associated with barrel I6 of Figures 1 and 2. This lip adapts the breech cup 35 for sliding reception in groove 3| of the breech assembly thus providing rotational movement of the barrel about its longitudinal axis relative to handle H 4 when mounted in breech cup 35 in a similar man ner to that specified previously herein.

Figure 4 illustrates a further modification of the breech assembly of Figure 2. Again breech plate 24b and handle flanges 23 are suitably interjoined in a rigid manner by means of rivets 30 to form an annular breech groove 3| between the offset peripheral edge 25b of breech plate 24b and flanges 23. Connection of barrel I612, illustrated in Figure 4 and comprising a throwaway metal cartridge such as is described in my application, Serial No. 171,100, of reference, to the gun I0 is made by means of a cylindrical and rotatable breech cup 40 in a manner similar to that described in discussing the assembly of Figure 3. An inwardly turned annular lip 4| distinguishes the rearward end of breech cup 40 and is providing for sliding reception in the annular breech groove 3| to permit rotational movement of cup 40 relative to handle I I. Junction of the throw-away barrel ISb with the breech cup 40 in this instance, is accomplished by an interrupted thread means consisting of a plurality of spaced apart, angularly positioned and inwardly turned fingers 42 formed at the forward end of cup 49. Mating outwardly projecting bosses 43 are formed at suitable intervals about barrel |5b for locking engagement with fingers 42 by means of a twisting rotation of the barrel relative to breech cup 40 in a known manner. Again rotational movement of barrel IS?) in this instance is provided by twisting the barrel and attached breech cup relative to handle I I, as with the assemblies in Figures 2 and 3.

Figure 5 illustrates a still further modification of my breech assembly I3 and it will be recognized that the mounting of the breech plate 240 thereof to handle II and flanges 23 is in a like manner to that previously described in connection with the assemblies of Figures 2, 3, and 4. Distinction is to be found in this modification over the previous forms, however, in the breech cup 45 which is connected at its inner end to the handle of breech plate by means of an inwardly turned annular lip 46 adapted for sliding movement in groove 3| as aforedescribed, Fastening of the barrel I60, which herein again is of the throw-away cartridge type like in Figures 3 and 4, to the breech assembly is accomplished through inwardly projecting, spaced extensions 41 formed in an annular side wall 48 of the cup. Corresponding outwardly extending bosses 48 are formed in the gun barrel I60 for mating engagement with extensions 41; bosses 49 being formed outwardly of the barrels cylindrical surface While extensions 4'! project inwardly of the cup side wall 58 so that mating engagement of locking pairs of extensions and bosses occurs at their opposed inner edges 50 and 5| respectively. This construction provides for a simplified and alternate type of interrupted thread connection between the gun barrel and breech cup while permitting rotational movement of said barrel relative to handle I for assisting the user in the distribution of the calking compound in a manner similar to that of the previously described assemblies.

Coming now to the features and details of my detachable head assembly I5, a study of Figures 1, 6, 7 and 8 will disclose that such assembly comprises a removable muzzle cap 52 adapted to cover over the muzzle end of a non-detachable barrel I6, such as is illustrated in Figure 1. Cap 52 is distinguished by a circular front wall 53 having a central outwardly projecting boss member 54 fitted with internal threads 55 for mounting the inner threaded end of the distributing nozzle 34 thereto. An annular side wall 56 is formed integrally with front wall 53 of the cap 52; being turned backwardly at right angles thereto by a suitable stamping operation or the like. At selected periodic intervals along wall 56 looking lugs 51 are formed in an inwardly projecting and angularly disposed manner; formation thereof being accomplished by cutting a rectangular shaped portion of wall 56 along three sides and turning such inwardly about the noncut edge 58 thereof. The extreme muzzle end of barrel [5 is fitted with corresponding outwardly turned lugs 59 adapted for mating locking engagement with lugs 51 of cap 52. The lugs of the barrel and cap comprise an interrupted thread connector for quick engagement to facilitate ready removal of the cap from the barrel when charging the barrel with calking compound or the like. Formation of lugs 59 of the barrel is accomplished by turning trapezoidal extensions of barrel [5 backwardly on the barrels outer surface, as seen in Figures 6 and 8, so that the outer edge 60 of the trapezoidal extension lies closest to the breech end of barrel Hi. It will be noted from Figure 6 that edges 60 of lugs 59 are disposed angularly in relation to a leading muzzle edge 6| of barrel l6; such angularity corresponding to the angular disposition of lugs 51 associated with cap 52. As seen clearly in Figure '7, the lugs of the cap and barrel lie in interlocking relation at spaced intervals about the muzzle end of barrel I6 in their interconnected relationship and when in mating engagement as illustrated in Figure 8, edge 60 of the barrels lugs 59 abuttingly contacts edge 62 of the cap lug 51.

Thus it may be seen that I have provided a calking gun assembly having a rotatable breech sub-assembly whereby it is possible to rotate a barrel portion of the gun relative to a stationary handle to assist the user in distributing the calking compound in difficult corners or the like as it emerges from the nozzle of the gun. Additionally, I have provided several modified forms and connective means for mounting the gun barrel to the breech assembly whereby throwaway cartridges having various styles of connecting means at their extreme breech end may be mounted in my breech assembly. Further, I have disclosed a quickly detachable head assembly comprising a, simple and convenient interrupted thread means wherein the interlocking thread portions are integrally formed from a removable muzzle cap and gun barrel to accelerate the process of loading a calking gun of the type having a non-detachable barrel.

While I have herein illustrated a preferred embodiment and several modifications of my invention, it readily will be understood that numerous changes, modifications, and substitutions of equivalents may be made therein without departing from its spirit and scope. I therefore, do not wish to be limited to the specific embodiments illustrated in the drawings except as may appear in the following appended claims.

I claim:

1. In a calking gun assembly of the class described, a handle member, a cylindrical barrel member, a rotatable breech assembly between said handle and barrel for mounting said barrel to said handle in a manner whereby said barrel is free to rotate about a longitudinal axis relative to said handle, said breech assembly comprising a circular breech plate riveted to said handle and having an inwardly oiiset annular flange reaching around its periphery whereby an annular groove is formed between said flange and handle when said plate is mounted to the latter, and an inwardly turned annular lip formed at the breech end of said barrel, adapted for sliding reception in said groove; and a removable muzzle cap for covering over the muzzle end of said barrel and supporting an extruding nozzle member, said cap being detachably mounted to said barrels muzzle end by integrally formed interrupted thread means between said cap and barrel whereby said cap is adapted for quick detachment from said gun.

2. In a calking gun assembly of the class described, a holding handle means, a rotatable barrel detachably mounted to said handle, and a breech assembly between said handle and barrel for detachably mounting said barrel to said handle in a manner whereby said barrel is adapted for rotative movement about a longitudinal axis relative to said handle, said breech assembly comprising a circular breech plate rigidly secured to a pair of outwardly turned flanges associated with said handle and said plate being distinguished by an inwardly offset annular flange member reaching about its circumferential periphery for forming a channeled groove betweer. said plate and handle flanges when said plate is mounted on the latter, a cylindrical breech cup having an inwardly turned annular lip at its rearward end which is adapted for sliding reception in said channeled groove so that said breech cup may move rotatively relative to said breech plate and handle, and threading connecting means formed in an annular side wall of said cup with mating threaded connective means formed around the breech end of said barrel whereby said barrel may be detachably mounted in said breech cup and rotate with said cup relative to said handle.

3. In a calking gun assembly of the class described, a holding handle means, a rotatable barrel detachably mounted to said handle, and a breech assembly between said handle and barrel for detachably mounting said barrel to said handle in a manner whereby said barrel is adapted for rotative movement about a longitudinal axis relative to said handle, said breech assembly comprising a circular breech plate rigidly secured to a pair of outwardly turned flange associated with said handle, and said plate being distinguished by an inwardly offset annular flange member reaching about its circumferential periphery for forming a channeled groove between said plate and handle flanges when said plate is mounted on the latter, a cylindrical breech cup having an inwardly turned annular lip at its rearward end which is adapted for sliding reception in said channeled groove so that said breech cup may move rotatively relative to said breech plate and handle, and interrupted thread means formed integrally with an annular side wall portion of said cup adapted to mate with additional interrupted thread means formed about the breech end of said barrel whereby said barrel may be mounted detachably in said cup and rotate therewith relative to said fixed handle.

4. In a calking gun assembly of the class described, a handle holding means, a pair of coplanar separated flange members extending outwardly from the upper end of said handle, a cylindrical barrel for storing a charge of plastic material to be extruded therefrom, and a rotatable breech means for connecting said barrel to said handle member whereby the latter is adapted 'formedradially inward of one end thereof;

mounted concentrically about the periphery of said plate member with said lip portion thereof being slidinglyengaged in the said channeled groove, and held betweeir said plate and handle flange members whereby said cup is rotatable relative to said handle.

WILLIAM J. S; EKINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,595,424 Sath'er Aug. 10, 1926 1,672,421 Negley June 5, 1928 1,986,166 Schneider Jan. 1, 1935 2,111,582 CreWe Mar. 22, 1938 2,115,591 Sherbondy Apr. 26, 1938 

